.imagebox {
    width: 100%;
    height: 0;
    position: relative;
    padding-bottom: 56.2%;
    padding-top:0px;
}
.image{
    width: 100%;
}
.imagefail{
    color:#C0C4CC;
    background-color:#F5F7FA;
    padding-top:26.1%;
    padding-bottom: 30.1%;
    text-align: center;
    height:0;
}
.el-dialog__body{
    padding-top:0px;
}